Warm Reminder 1. You can choose the size according to your body size. Do not select according to your habit. 2. As measured by hand,1-3cm difference is allowed(1cm=0.3937inch). 3. If you don't know what size to choose, contact us to give you the correct size suggestion. Fabric 100% Polyester fabric with, 80% white duck down filling, warm, windproof, breathable, and abrasion-resistant properties. Duck Down-Padded Down reduces the weight of the jacket. It gathers heat quickly and keeps you warm. Graphene Lining Rapid heat conduction, lock the temperature and keep warm. Perfect For Designed for spring & autumn, outdoor sports.